Isotopes Quiz
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5 questions, one answer each
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1. What is the correct definition of isotopes?
- A. Atoms of different elements with the same mass number
- B. Atoms of the same element with the same number of protons but different numbers of neutrons
- C. Atoms of the same element with different numbers of protons
- D. Ions formed from the same element
2. An atom is represented with mass number 14 and proton number 6. How many neutrons does it have?
- A. 6
- B. 8
- C. 14
- D. 20
3. Why do isotopes of the same element react chemically in the same way?
- A. They have the same number of neutrons
- B. They have the same number of electrons and electronic configuration
- C. They have the same mass number
- D. They are radioactive
4. Copper has two isotopes: copper-63 (69% abundance) and copper-65 (31% abundance). What is its relative atomic mass?
- A. 63.6
- B. 64.0
- C. 63.0
- D. 65.0
5. Two isotopes of the same element are compared. Which property will definitely be identical between them?
- A. Number of neutrons
- B. Mass number
- C. Number of protons and number of electrons
- D. Relative isotopic mass